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    <title>dhnorm</title>
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    <center>Scilab Function</center>
    <div align="right">Last update : April 1993</div>
    <p>
      <b>dhnorm</b> -  discrete H-infinity norm</p>
    <h3>
      <font color="blue">Calling Sequence</font>
    </h3>
    <dl>
      <dd>
        <tt>hinfnorm=dhnorm(sl,[tol],[normax])  </tt>
      </dd>
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    <h3>
      <font color="blue">Parameters</font>
    </h3>
    <ul>
      <li>
        <tt>
          <b>sl</b>
        </tt>: the state space system (<tt>
          <b>syslin</b>
        </tt> list) (discrete-time)</li>
      <li>
        <tt>
          <b>tol</b>
        </tt>: tolerance in bisection step, default value <tt>
          <b>0.01</b>
        </tt>
      </li>
      <li>
        <tt>
          <b>normax</b>
        </tt>: upper bound for the norm , default value is <tt>
          <b>1000</b>
        </tt>
      </li>
      <li>
        <tt>
          <b>hinfnorm</b>
        </tt>: the discrete infinity norm of <tt>
          <b>Sl</b>
        </tt>
      </li>
    </ul>
    <h3>
      <font color="blue">Description</font>
    </h3>
    <p>
    produces the discrete-time infinity norm  of a state-space system 
    (the maximum over all frequencies on the unit circle of the maximum singular value).</p>
    <h3>
      <font color="blue">See Also</font>
    </h3>
    <p>
      <a href="h_norm.htm">
        <tt>
          <b>h_norm</b>
        </tt>
      </a>,&nbsp;&nbsp;<a href="linfn.htm">
        <tt>
          <b>linfn</b>
        </tt>
      </a>,&nbsp;&nbsp;</p>
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